Review on 🔧 IRWIN Tools Black Oxide, Model 4935643 by Sam Bhushan

5/16/13 - I used one of the smaller ones and barely touched the plastic with it and it broke. Not sure if it's due to landing in the feed? I've used thinner bits in a regular chuck with no problems. In fact, I mostly break them when I tilt the drill and almost never while I'm working. But this little piece broke immediately in the hex shank configuration. So now I guess it's not that hot. You can get a really good hex shank drill chuck that will work with extra fine bits. Instead I used it with my old fine tips and got great results.*********************************** * *** I haven't used them often but when I do use them I really enjoy having them. I haven't had a chance to use my new Bosch Wireless. Now I have them, as well as a cassette to use in my box of old Rockwell beats from my late uncle's days (whoo the 60's and 70's!).